Advertising device.



G. MCI. scoTT.v

ADVERTISING DEVICE.

APPLICATION FILED SEPT. I9. 1914.

Patented Oct. 24, 1916.

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To aZZ whom it may concerm.

Be it known that' I, GEORGE McINTosH SCOTT, a subject of the King at 59 Torrington Square, London,

W., England, have invented certain new and useful mprovements in Advertising De` of which the following is a specification. v

This invention relates to an advertising like are produced. ForA this purpose two mirrors are employed, one behind the-other at a slight distance apart. The front mirror is a translucent mirror, that is to say, a sheet of glass having a thin coating of silver or the like on its rear surface, the coating being sufficient to form a reflecting surface by `reiected light, but sulciently thin to be seen through by transmitted light. The rear mirror has a thick coating not transparent y to transmitted light.

' are inclined t0 one another.

sents the general eilect obtained from a simple design with the arrangement according I,

produced'fliy In the' accompanying' drawing, Figure 1 represents diagrammatically the formation of the' images when both mirrors are plane and parallel, and Fig. 2, when ythe mirrors Fig. 3 repreto Fig. 1, and Fig. 4 is a transverse sectional viewthrough 'a practical embodiment of the device.

In Fig. 1, A is the rear mirror bein-g an ordinary non-translucent mirrorv thickly coated on its back 'a on which thedesign m represented for simplicity by the letter N,'is

removing the silvering by etching or otherwise so that the design is translucent or transparent. Bis the front translucent mirror, parallel to A', with thereiiectthe rear or side adjacent to A. Z is the distance between the surface b and ','the object 'An ima produced at the distance d from 'b on the left hand of B521 1 produces an image :1v1-as far bhind'a as yl'isbefore a', that is at 2d fromaithe image rfgives rise to an .image y, by reflection from the mirror b, y, is distant 3d' from b and 4d from a and produces an image w, at a distance of 4d so on. It will be noticed that'the images are formed directly behind one 'another and at a distance apart, twice that separating thev surface ,a from the surface b,

and-by 'decreasing this distance the images are-brought Specification of Letters Patent. Application led September 19, 1914. Serial No. 882,571.

"the des1gn, y1, g2'

from an', and A comprising a Patented 0615.24, 191e.

closer together, until they ened or block-shaped sign. the rear mirror on which the design is formed is in.

lined to the plane translucent mirror, each image vof the same point 'of the design will lie in a circular arc,' of which the center isy the point of intersection of the two mirrors and the radius is the distance from the point of intersection to the said point.

In Fig. 2, A and -B represent the reiecting surfaces of the mirrors, m is any point of images to the left of w1, x2 images, seen by the observer, tothe right of A, which lie on a circle about the point of intersection O of the surfaces A and B, the radius of the circle being O Other points of the design, such as p, will similarly give rise to p2 lying on a circle concentric with the former.

one or more incandescent electric lamps, or other source of illumination, disposed in a closed opaque chamber at the back ot the ordinary mirror, the sides of the chamber being formed of sheet tin or other reflecting material.

a series4 of images, p1,

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effi

l l 'is The design is preferably illuminated by A practical form of the'device is shown in Figs. 3 'and Alof the drawing. In a .box or chamber C, formed or lined preferably with sheet tin c or othenreilecting material are arranged two electric lamps c1 supplied with current-from any convenient' source. The front of this box is' closedl byl aframe D in which the two mirrors B and A are mounted, being *spaced apart by fillets d. The ront mirror is translucent being lightly silvered on the backat b. he rear mirror A is heavily silvered onthe back a, the silvering -being removed at :v -to represent the desired sign, in the case illustrated, the words National signs. AThe design may be represented by .plainf'glas's, or etched lass, which may, if desired, be provided with a coating of transparent color or'colors, and the back may, if desired, vbe 'varnished or provided with other ordinary protective coating.

By the expression design I intend ito include any design, picture, pattern or lettering.

' .1. A `'multiple imagaadvertisiiig device front sheet gif-,transparent mareflected between same, substantially as clescribed. ff

4. In a device of the vcharacter described, the combination of a plurality of reflectors, and a design mounted in connection with one of said refiectors and arranged to be reected back and forth between the latter to produce the eiect of a multiple image, substantially as described.

In testimony whereof I have aiixed my signature in presence of two witnesses.

GEORGE MGINTOSH SCOTT.

Witnesses:

ALBERT JONES, W. E. ROGERS. 

